Flushing cistern



April 13 1926. ll 581,011

' W. C. D. NORTH FLUSHING- CISTERN Filed Jan. 20. 1925 I W Avg Patented Apr. 13, 1926.

UNliEc stares rArsnr WILLIAM enemies nrneav Non'rn,

rams.

or DUNEDIN oraeajnaw ZEALAND.

rLUsnIne ors'rnnn.

Application filed January 20, 1925. Serial No. 3,662.

To all 20720222 it may concern:

Be it known that I, WILLIAM CHARLES DINGEY Nonrrna subject of King George V of Great Britain, residing at 40 Bowling Street, Dunedin Qtago, in the Dominion of New Zealand, have invented certain new and ,eful Improvements in Flushing cisterns, f which the following is a specification.

This invention relates to flushing cisterns commonly used in lavatories. s

Figure 2 is also a sectional elevation of cistern through line A-B, of Fig. 3, showing relative positions of the variousparts when the cistern is full. 7

In this View the relative position ofthe outlet valveand the members necessary for its movement, when actuated uponto flush, is indicated by dotted lines.

Figure 3 is a plan view of Figure 2, the cover beingremoved.

Figure l is anend view of the cistern showing inlet and interchangeable overflow;

Figure 5 is an enlarged sectional view of the valve, showing the. spring supported weight.

*igure 6 shows in detail the end of the valve actuating lever.

Figure 7 is a plan view-of the trigger.

Figure 8 is a side view illustrating in enlarged detail the trip mechanism.

There is an ordinary inlet valve 1 with which a ball cock lever 2 is pivotally susportion pended at 3, the float of the said ball cock lever being indicated at 1. There is a valve consisting of a weighted portion 5 mounted on a spindle 6, and having a circular recess 7 cast in its under surface to allow the end portion of a helical spring 8 being housed therein. There is a disc 9 which is either cast integral with the spindle 6, or fitted thereon at separate member; tinder surface of the disc is with a; suitable jointing material 10, Which is secured to the said dlsc, and by means ofa nut'll screwed upon the spindle 6.' The said spindle provides a guide for the valve by engaging with a guide member 12 fixed to the interior of the outlet fitting 13.

There is a valveseatll formed on the outlet fitting 13, which issecured to the bottom 15 of the cistern, having. suitable jointing material, as at 16 to prevent leakage; the nut 17 whichis adapted to screw-upon a thread formed on the said outlet secures it to the cistern, as it frequently happens in fittings of this class the jointing material is damaged by the fittingl? turning with the nut 17, when adjusting the fitting vto fixit to the bottom or detach it, provision is made to preventthe said outlet member from turncasting a lug 13 on the flange 13 of the outlet 13, and by casting pins 15 on the inner surface of the bottom 15 of the cistern. The lug 13 isadapted to fit between the pins 15 as indicated in' Figure 3.

here is a push rod 18 having a knob 19 projecting through the cover of the cistern, the said push rod 18 is pivotallyconnected with the valve lifting lever 20, and the said lever 20 being.pivo'tallyinounted upon a bracket 21 at 22. I V f The lever 20 ispivotally linked with the valve, as indicated at 23 the said lever 20 is bent at'2O and 20 as shown, in Figure 6,

so that the portion 20 approximately at right angles to the Valve lifting lever 20, theedge 20 in the'portion 20 being preferably oftriangular section,the face 24 beingthe under surface to provide a better contact surface. with the combined holding and releasing member; (hereinafter referred to as the trigger member 25) the said trigger is pivotedto a bracket; 26, which is adjustably attached to the ball cock lever 2 by means of a stud 27 and the jamb nut 27*.

Now describing the operation of the valve by the specially designed trip gear, the water in the cistern is maintained at the level indicated at 28 in Figure 2, on the valve 1 being in its closed position as in Figure 2, and the ball cock lever 2 and float 4: being in the position indicated in full lines in the same figure. To release the waterfor flushing purposes, pressure is put upon the knob 19 of the push rod 18 to depress it sufficiently to enabje the portion 20 of thevalve lifting layer 20 to tilt the trigger12'5; the

caress 2O assets the said these to u M 1:55;

clear and ,permit it to return tonormal position, and uponreleasing the pressure on push rod 18 the lever 20 recedes untilthe portion 20 tcomes to l-est iiireontaet with the surface of the trigger 25, whereby the valve is held in open position, as indicated byrbroken lines in Figure 2, until the water level in the oisternis reduced to the approximate minimum onibeing discharged -for flushing operation.

As the water dischargesthrough :the outlet- 13, the ball cock lever follows the decreasing water level, until 1t assumes its lowest position'indicat-ed in Figure, 1, and

in thatposition or approximately so, the point 25. of the trigger 25 becomes CllS- engaged with the part 20 of the valve lift inglever 20. The point 253 o't'the said trigger 25 describes an are indicated bybroken lines at 29 in Figures '1 and 2, and upon reaching the point 29 the outlet valveengages with its seat 'll, closing the outlet orifice and the water discharging through theinlet valvel retills the cistern ready tor the next operation.

What I claim as new and desire to secure by Letters "Patent is 1. In a flushing tank having an inlet valve, an outlet valve, a ballcock lever for oontrolling the inlet valve in accordance with the evel of fluid in the-tank, a manually operatable "lever connected to p and adapted to operate the outlet valve, and

means ,carried'by the'ballcock lever to support the manually ,operatable lever and thereby the outlet valve in open position during movement of the'ball cook lever ineident to the lowering of the level of the .liqui diin the tank,,said iball cock lever rie'd means {automatically releasing the manually opera-table lever at a predetermined'liquid level in the tank.

car- 2. In a flushing tank, an inlet valve,an

outlet valve, a ball cock lever for controlling "the inlet valve, a manually operatable lever:

for actuating theoutlet'valve, a trigger carriedby-the ball cock lever, and an extension on ,themanually operatable lever to be engagedand supported by the trigger-to hold the manually operatable lever and thereby "the outlet valve :11) open -POSIUOII during movement of the ball cock lever incident to the receding level of the liquid in the tank,

said triggerand manually operatable lever --1novingon opposing curved lines in operation to cause the lever to be released from the holding action of the-trigger at a predeterminedlevel of liquid in the tank.

,3. In a flushing tank, an'inlet valve, a ball cock lever controlling the same, a. trigger carried by said lever and capable of independent upward movement but prevented "trom downward movement, an outlet valve, a 'manually operatable lever connected'to 'saidvalve, and an extension on said lever to engage and upwardly displace'the trl r to permit the trigger to ride beneath and support said manually-operatable lever during the greater portlon oi the'tlownward movementofthe ball cook lever in the receding level of the liquidin the tank.

In a flushing tank, an inlet valve, :1. ball cook lever controll ng the same, a trigger carried by said lever and capable of independent upward movement but prevented from downward movement, an outlet valve, a emanua'lly operatable lever connected to "said valve, and-an extension on said lever to engage and upwardly dlsplace the trigger to permit the trigger to ride beneath and support said manually operatable lever during the ,greater portion of the downward movement of-theball cock lever in the receding level of the liquid -in-thetank, tl 1e movementot'the ball cock 'lever in the de- 

